31119 has 16 divisors (see below), whose sum is σ = 48384. Its totient is φ = 17600.
The previous prime is 31091. The next prime is 31121. The reversal of 31119 is 91113.
It is a de Polignac number, because none of the positive numbers 2k-31119 is a prime.
It is a super-2 number, since 2×311192 = 1936784322, which contains 22 as substring.
It is a Smith number, since the sum of its digits (15) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a zygodrome in base 2.
It is a junction number, because it is equal to n+sod(n) for n = 31098 and 31107.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (31139) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739 + ... + 779.
It is an arithmetic number, because the mean of its divisors is an integer number (3024).
231119 is an apocalyptic number.
31119 is a deficient number, since it is larger than the sum of its proper divisors (17265).
31119 is a wasteful number, since it uses less digits than its factorization.
31119 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 78.
The product of its digits is 27, while the sum is 15.
The square root of 31119 is about 176.4057822182. The cubic root of 31119 is about 31.4539513606.
The spelling of 31119 in words is "thirty-one thousand, one hundred nineteen".
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